The event concluded with a dramatic fireworks display as the newlyweds shared a kiss.
Ng, 31, is both a model and actress who entered the entertainment industry in 2010 and debuted on screen in 2011.
Sze, 35, serves as the vice president of a digital payment platform and is an alumnus of George Washington University in the U.S.
His family, including a grandfather and father who are prominent businessmen, has a reported net worth of HKD10 billion (US$1.28 billion), according to Chinese media.